Wisconsin Gov. Scott Walker signed a multibillion-dollar package designed to incentivize tech manufacturer Foxconn to build a factory in the state. But some are concerned it may not be constitutional.

The bill changes the rules for how the state approaches legal challenges involving the plant. It lets the Wisconsin Supreme Court take appeals directly and automatically stays lower court rulings during the appeal process.

The Wisconsin Legislative Council, which studies the state's laws, raised questions about the legality of the bill. It said a court could rule the bill unconstitutional "if it finds that this provision violates the judiciary's independence."